涪江五桥斜拉桥主塔曲线爬模设计及线形控制

Design and Linear Control of Curve Climbing Formwork for Main Cable-Stayed Tower of NO.5 Bridge of Fujiang River

以四川省涪江五桥斜拉桥曲线主塔为例,对主塔曲线结构施工设计进行分析,为保证主塔曲线线形与设计的完全吻合,采用爬模施工技术的同时,对于中、上塔柱采用全空间曲面线形控制技术,在模板的设计与构造上,通过在木梁与面板之间添加造型木条满足结构变化要求,实现竖向弧度。为保证空间全曲线线形,采用全站仪三维坐标技术、三角高程中间置站法、几何水准测量技术等相互校核进行测量定位控制。

Take the main curved tower of No. 5 cable-stayed bridge of Fujiang River in Sichuan as background, the construction design for the main tower curve structure is analyzed in this paper. To make sure that the curve shape of the main tower is fully consistent with its design, the climbing formwork construction technology is used at the same time. For the middle and upper tower, the linear control technology of the whole space surface is adopted. In the template design and structure, the vertical curvature is realized by adding modeled wood between the beams and panels to meet the requirements of structure changes. To ensure the linear shape of the whole space surface, the total station 3 D coordinate technology, triangle elevation middle setting station method and geometric leveling technology and so on are used to control the measurement and position by mutual checks.